Those who contributed less can still get in on a piece of Kickstarter history: A $25 contribution earned a Coolest-branded reusable party cup and a drink guide; for $55, backers receive the party cup plus a "Keep Calm and Blend On" tee.

And for the first eight backers who contributed $2,000, Grepper will fly out and help them host a tailgate party with the Coolest (before its available to backers in February 2015).The record is impressive by any measure, but the last couple days have been a whirlwind: Backers contributed over $2 million in 24 hours.

The rush to contribute in the final days isn't all that shocking to Jason Greenberg, PhD and assistant professor at New York University's business school.

"This is something we tend to see in cultural settings where the 'rich get increasingly richer,'" said Greenberg. "A firm end date and time can precipitate this."

The success of the Coolest is perhaps all the more surprising because this isn't its first time around the Kickstarter block.

Grepper unsuccessfully tried to raise $125,000 for similar model In November 2013 (he only earned $100,000),

"My confidence was pretty low because of the first campaign," said Grepper.

But a combination of seasonality (launching the campaign in July vs. November), more supporters and an improved design helped him get far more than his $50,000 goal this time around.

Setting the bar so low -- and meeting it within 36 hours of launching -- has helped him get ahead on production. He's currently in the process of locking in a final design and securing a factory to produce the coolers (which will be available in three colors: Margarita, Blue Moon and Coolest Orange).